A columnar sediment gravity sampler for deep sea cableless sampling and its application

Abstract

The invention provides a cableless gravity sampler, comprising a recovery unit and a discarding unit, wherein the recovery unit comprises a hook connected with a floating body, and an inner pipe of the sampler; the hook is connected with the bottom of the floating body and the top of the inner pipe of the sampler; the discarding unit comprises an outer pipe of the sampler, a balancing weight and a trigger unlocking mechanism; the trigger unlocking mechanism is in sleeve connection with the outer wall of the outer pipe of the sampler under the balancing weight; the outer pipe of the sampler sleeves the inner pipe of the sampler, and the inner pipe of the sampler can slide along the axial direction in the outer pipe of the sampler; at least two locking through holes are evenly formed along the circumferential direction of the middle section of the wall of the outer pipe of the sampler; the outer wall of the inner pipe of the sampler is provided with a locking groove or diameter expansion locking holes; locking beads are arranged in the locking through holes and the locking groove; bead exit grooves are formed in the middle part of the inner wall of an unlocking sleeve; the bead exit grooves are positioned under the locking beads, and the distance between the upper end of the unlocking sleeve and the lower edge of the balancing weight is greater than those between the bead exit grooves and the locking beads. The cableless gravity sampler is higher in reliability and safety, and lower in cost.

Description

technical field

[0001] The invention relates to a marine detection device, in particular to a seabed sediment layer sampler, in particular to a cableless seabed sediment layer sampler. Background technique

[0002] Deep-sea earth and life science is currently a major international frontier scientific field, and its development is closely dependent on breakthrough innovations in deep-sea technology. Obtaining seabed sediments is one of the most common and important means in the process of deep sea research, which is of great significance to the study of geology, paleoclimate and microbial information in sediments. Throughout the history of seabed sediment research, it is not difficult to find that so far, research on seabed sediments in ultra-deep (water depth greater than 7,000 meters) sea areas such as the sea bucket abyss is very weak. There are 25 trenches in the world with a depth greater than 7,000 meters, of which 18 are in the Pacific Ocean, including the Mariana Tre...

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